CA1160384A - Ethylene polymer compositions stabilized against water treeing by an organic titanate; and the use thereof as insulation about electrical conductors - Google Patents
Ethylene polymer compositions stabilized against water treeing by an organic titanate; and the use thereof as insulation about electrical conductorsInfo
- Publication number
- CA1160384A CA1160384A CA000391152A CA391152A CA1160384A CA 1160384 A CA1160384 A CA 1160384A CA 000391152 A CA000391152 A CA 000391152A CA 391152 A CA391152 A CA 391152A CA 1160384 A CA1160384 A CA 1160384A
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- Canada
- Prior art keywords
- composition
- titanate
- organo
- ethylene polymer
- chelate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2813—Protection against damage caused by electrical, chemical or water tree deterioration
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/05—Alcohols; Metal alcoholates
- C08K5/057—Metal alcoholates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/294—Coated or with bond, impregnation or core including metal or compound thereof [excluding glass, ceramic and asbestos]
- Y10T428/2958—Metal or metal compound in coating
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Organic Insulating Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Insulated Conductors (AREA)
Abstract
SUMMARY OF THE INVENTION
This invention relates to ethylene polymer compositions devoid of added mineral fillers, which are stabilized against water treeing by an organo titanate. The compositions of this invention are particularly useful as extrudates about electrical conductors to provide insulation thereon which is resistant to deterioration in he presence of moisture and an electrical field, as evidenced by resistance to water treeing.
This invention relates to ethylene polymer compositions devoid of added mineral fillers, which are stabilized against water treeing by an organo titanate. The compositions of this invention are particularly useful as extrudates about electrical conductors to provide insulation thereon which is resistant to deterioration in he presence of moisture and an electrical field, as evidenced by resistance to water treeing.
Description
33~3~
BACKGROUND OF THE INVEMTION
Ethylene polymers have been modified by the addition thereto of mineral fillers and organo silanes for the purpose of providing compositions which have improved resistivity to moisture and consequently improved electrlcal properties as dis-closed in ~.S. Patent 3,957,719 granted May 18, 1976. For example, or~ano silanes such as v;nyl tris(2-methoxyethoxy) silane have been added to polyethylene compositions containing clay and the resultant compositions suggested or use as insu-lation about electrical cables. Such compositions, however, ; have been found deficient when used as insulation about cables carrying high voltage current, on the order of at least five kilovolts. }n such cases, it has been found necessary to subject thecompositions to a prolonged heat treatment in order that the resultant insulated cable~have an acceptable low power factor.
Compositions have also been formulated based onethylene polymers, mineral fiilers and organo titanates and used as insulation about electrical conductors as disclosed in V.S. Patent 4,020,214 granted April 26, 1977. An ethylene poly-20 mer composition containing a mineral filler and an organo ti-tanate has not been found acceptable for use as insulation about electrical conductors carrying high voltage c~rrent as such composition impairs the transmission efficiency of the in-sulated electrical conductor.
_ESCRIPTION OF THE INVEI~rlON
The present inventio~ provides composi~ions, based on ethylene polymers,which can be successfully used as insulation
BACKGROUND OF THE INVEMTION
Ethylene polymers have been modified by the addition thereto of mineral fillers and organo silanes for the purpose of providing compositions which have improved resistivity to moisture and consequently improved electrlcal properties as dis-closed in ~.S. Patent 3,957,719 granted May 18, 1976. For example, or~ano silanes such as v;nyl tris(2-methoxyethoxy) silane have been added to polyethylene compositions containing clay and the resultant compositions suggested or use as insu-lation about electrical cables. Such compositions, however, ; have been found deficient when used as insulation about cables carrying high voltage current, on the order of at least five kilovolts. }n such cases, it has been found necessary to subject thecompositions to a prolonged heat treatment in order that the resultant insulated cable~have an acceptable low power factor.
Compositions have also been formulated based onethylene polymers, mineral fiilers and organo titanates and used as insulation about electrical conductors as disclosed in V.S. Patent 4,020,214 granted April 26, 1977. An ethylene poly-20 mer composition containing a mineral filler and an organo ti-tanate has not been found acceptable for use as insulation about electrical conductors carrying high voltage c~rrent as such composition impairs the transmission efficiency of the in-sulated electrical conductor.
_ESCRIPTION OF THE INVEI~rlON
The present inventio~ provides composi~ions, based on ethylene polymers,which can be successfully used as insulation
-2-~bout conductors carrying high voltage current without the neces-sity of subjecting the compoSitionS to ~ subsequent heating step in order that the resultant lnsùlated3 electrical conductors have an acceptable low power factor. In addition, the compos~tio~s of this invention have improved resistivity to water treeing and re-tain this resistivity, as ~nifested by ~ood insuiating qualities over prolonged periods of time. Also, the compositions of this ~t vention, when used as insulation about electrical conductors,such as copper wires and cables, are relatively free o points of high electrical stress, found in systems containing mineral fillers.
points of high electrical stress are due to the agglorneration of mineral fillers. Furthermore, electrical conductors insulated with the compositions of the present invention are characterized by improved transmission efficiency.
Compositions comprising an ethylene polymer and an organo ti-tanate are also characterized by additional advantageous proper-ties. For example, the organo titanates will undergo hydrolysis and form alcohols. These alcohols, in turn; also function as wa~r tree growth inhibitors in the ethylene compositions. In effect,the 2~ organotitanates, properly selected for hydrolysis rate, will ~ve as a l'contact tablet" for slow release of a water tree growth in-hibitor. Ethylene polymer compositions containing organo ~itanates and used as insulation about electrical conductors have extended work lie due to the excellent compatability of the ~olymer with the organo titanate and negligible tender~y of the titanate to volatilize.
The compositions of this invention are devoid of mineral fil-lers and comprise an ethylene polymer and an or~anQ titanate wherein the organo titanate is present in an amount sufficient to improve the water treeing resistance thereof. Generally, the or-gano titanate is present in an amount of about 0.1 to about 5 percent by weight, preferably in an amount of about 0.5 to about 2 percent by weight based on the weight of the ethylene polymer.
The ethylene polyrners which are used in the compositions o the present invention are solid (at 25~C) materials which may be homopolymers, or copolyrners of ethylene. The ethylene
points of high electrical stress are due to the agglorneration of mineral fillers. Furthermore, electrical conductors insulated with the compositions of the present invention are characterized by improved transmission efficiency.
Compositions comprising an ethylene polymer and an organo ti-tanate are also characterized by additional advantageous proper-ties. For example, the organo titanates will undergo hydrolysis and form alcohols. These alcohols, in turn; also function as wa~r tree growth inhibitors in the ethylene compositions. In effect,the 2~ organotitanates, properly selected for hydrolysis rate, will ~ve as a l'contact tablet" for slow release of a water tree growth in-hibitor. Ethylene polymer compositions containing organo ~itanates and used as insulation about electrical conductors have extended work lie due to the excellent compatability of the ~olymer with the organo titanate and negligible tender~y of the titanate to volatilize.
The compositions of this invention are devoid of mineral fil-lers and comprise an ethylene polymer and an or~anQ titanate wherein the organo titanate is present in an amount sufficient to improve the water treeing resistance thereof. Generally, the or-gano titanate is present in an amount of about 0.1 to about 5 percent by weight, preferably in an amount of about 0.5 to about 2 percent by weight based on the weight of the ethylene polymer.
The ethylene polyrners which are used in the compositions o the present invention are solid (at 25~C) materials which may be homopolymers, or copolyrners of ethylene. The ethylene
-3~
copolymers contain at l~ast 30 weight percent of ethylene and up to about 70 weigh~ percent of propylene, and/or up to about 50 weight percent of one or m~re other organic compounds which are interpolymerizable with ethylene. These other compounds which are interpolymerizable with ethylene are pr~eferably those wh;ch contain polymerizable unsaturation, such as is present in com-pour'~ds containing an ethylene linkage~ ~C = C . These other interpolymerizable compounds may be ~-olefins such as, butene-l, pentene-l, octene-l and the like. Vinyl compounds, such as vinyl acetate and ethyl acrylate may also be interpolymerized with ethylene up to a maximum content of about 5 percent by wei~ht.
preferred copolymers are ethylene/ethyl acrylate co-polymers, ethylene/propylene copolymers, ethylene/butene co-polymers and the like.
Also included in the term polymer are blends of one polymer with one or more other polymers. Illustrative of such - blends are polyethylene with polypropylene, low-density polyethylene with high-density polyethylene, and polyethylene with olefin copolymers such as these indicated above.
The low-density ethylene copolymers with o-olefins may be made under low pressure conditions of about 150 to 300 psi with supported chromium oxide based catalysts ~hat are modified with titanium and optionally, fluorine, as disclosed in U.SO
patent Nos. 3,666,736 and 4,011,382.
Suitable ethylene polymers have a denslty ~ASTM 1505 test procedure with cor,ditioning as in ASTM D-1248-72~ of about 0.86 to 0.96 grams/cubic centimeter and a Melt Index (ASl~ D-1238 at 44 psi test pressure) of about 0.1 to 10 deci~rams per
copolymers contain at l~ast 30 weight percent of ethylene and up to about 70 weigh~ percent of propylene, and/or up to about 50 weight percent of one or m~re other organic compounds which are interpolymerizable with ethylene. These other compounds which are interpolymerizable with ethylene are pr~eferably those wh;ch contain polymerizable unsaturation, such as is present in com-pour'~ds containing an ethylene linkage~ ~C = C . These other interpolymerizable compounds may be ~-olefins such as, butene-l, pentene-l, octene-l and the like. Vinyl compounds, such as vinyl acetate and ethyl acrylate may also be interpolymerized with ethylene up to a maximum content of about 5 percent by wei~ht.
preferred copolymers are ethylene/ethyl acrylate co-polymers, ethylene/propylene copolymers, ethylene/butene co-polymers and the like.
Also included in the term polymer are blends of one polymer with one or more other polymers. Illustrative of such - blends are polyethylene with polypropylene, low-density polyethylene with high-density polyethylene, and polyethylene with olefin copolymers such as these indicated above.
The low-density ethylene copolymers with o-olefins may be made under low pressure conditions of about 150 to 300 psi with supported chromium oxide based catalysts ~hat are modified with titanium and optionally, fluorine, as disclosed in U.SO
patent Nos. 3,666,736 and 4,011,382.
Suitable ethylene polymers have a denslty ~ASTM 1505 test procedure with cor,ditioning as in ASTM D-1248-72~ of about 0.86 to 0.96 grams/cubic centimeter and a Melt Index (ASl~ D-1238 at 44 psi test pressure) of about 0.1 to 10 deci~rams per
-4-minute.
Illustrative of or~no titana~es suitable or p~rposes of the present ~nvent;on are those ~lling within the scope of Formula ~
Formula I Ti(OR)4 wherein each R, which can be the same or different, is hydrogen ; or a hydrocarbon radical having one to 24 carbon atoms inc~usive, preferably one to 14 carbon atoms inclusive. By definition of an organo titanate at least one R is a hydrocarbon radical.
Exemplary of suitable hydrocarbon radicals are alkyl radicals such as methyl, ethyl, n-propyl, isopropyl, butyl, octyl, lauryl, myristyl, stearyl and the like, cycloaliphatic radica~s such as cyclopentyl, cyclohexyl and the like, aryl radicals such as phenyl, methylphenyl, chlorophenyl and the like, alkaryl radicals such as benzyl and the like.
Particularly desirable titanates falling within the scope of Formula I are those wherein each R is alkyl having one to 24 carbon atoms inclusive, preferably one to 14 carbon atoms inclusive, exemplified by tetrabutyl tieanate, tet~a-isopropyl titanate and the like.
Organo titanates falling within the scope of Formula Iare known compounds and can be conveniently prepared as describ-ed in U.S. patent 2,984,641 to Leon E. Wolinski patented May 16, 1961.
other suitable organo titanates are the organo titanium chelates such as tetraoctylene glycol titanium, triethanol amine titanate, titani~n acetyl acetonate, titanium lactate and the like.
In addition to the ethylene polymer and the organo titanate,the co~positions of the pre~ent inYention can als~ con-tain crosslinking agents when the composition is to be chemical ly crosslinked. These chemical vulcanizing, curlng or crosslink-ing agents are well known to those i~ the art and include the organic peroxide type of crosslinking agents which are disclosed for example, in ~.S. patents Nos~ 2,826,570, ~,88B,424, 2,916,471, 3,079,370 and 3,296,189. The chemical crosslinking agents may be used individually or in combination with one another, and they are usedin.crosslinkin~ amounts~ The pre~erred cross-]inking agent is a di~ ~-cumyl peroxide The compositions of the present invention can alsG in-clude one or more suitable high temperature antioxidants for the ethylene polymer in such compositions. The antioxidants include sterically hindered phenols or amines~ polymerized 2,2,4-tri-methyl dihydroquinoline, thiodiethylene-bis(3,5-ditert-butyl-4-hydroxy) hydrocinnamate, distearylt~iodiproprionate and the like.
Other additives which can be employed in the composi-tions of the present invention would-include additive~ commonly employed in ethylene polymer based dielectrlc compositions, in-cluding lubricants, oil extenders, dyes and colorants and metal deactivators.
The compositions of the present invention can also be extended with polymers,other than the ethylene polymer, which are compatible, i.e , can be physically blended or alloyed, or grated,with the ethylene polymer. The resul~ant compositions should contain at least about 30 weight percent of interpolymeriz-ed ethylene in ~11 the polymers that may be present in the '~J 6 3~
composition, based on the total weight of the ~esultant composi-tion. The other polymers which can be used include p~lypropyl-ene, rubbers or elastomers such as styrene-butadiene block copolymers 7 ~rethane elastomers, polyes t er elastomers, natural r~bber and the like.
The total amount of additives used w~ll range from O
to about 60 wei~ht percent~ preferably O to 10 weight percent based on the total weight of the compoSitionS
The following examples further illustrate the present invention and are not intended to limit the scope thereof in any manner.
Compositions were formulated, tested and rated for WTGR (Water Tree Growth Resistance) against a relative WTGR of 1.0 for a Control.
The water tree grvwth resistance of a composition con-taining a commercial grade of polyethylene ho~opoly~er having a Melt Index of 0.2 dg/minute and a density of 0.92 grams/cubic centimeter and 0.10 percent of 4j 4'thiobis(3-methyl-6-tert-butyl phenol) was determined by the procedure described in U.S, 20 patent 4,~12,756 granted March 13, 1979~ This composition had a relati~e value of 1.0 ~or water tree growth resistance.
A series of compositions were formulated and tested for WTGR. Each composition was prepared by admixing the ethylene polymer and organo titanate in a Brabender mixer at a tempera-ture of 155C until homogeniety was reached. Once homogeniety was reached, a heat stabilizer was added to the composition and mixing continued to a homogeneous mixture. Contents oE the Brabender were discharged and stored under argon unt~l tested * Trademark -7-.or water tr~ein~ growth resistance (WTGR) as described ~n U.S.
4~212,756 D
. COMPOSITIONS
FORMVLATION: _PER OE NT B ~EIGHT
A B C D
polyethylene Melt Index 0.2 dglmin Density 0.92 grams/cc ~.9 98.9 9~.9 98.
.
4,4'-thiobis(3-methyl-6- ~
tert-bu~yl,~henol) 0.1 0.1 0.1 0.1 (heat stabllizer) Tetraoctylene glycol titanium chelate 1.0 ---- ---- ----sopropyl tri-(lauryl-myristyl)titanate -~__ 1.0 Tetra-stearyl titanate ---- ---- 1.0 ____ , Tetrakis-(~-ethyl hexyl) titanate ---- ---- ---- 1.0 -WTGR 0.1730.189 0.435 0.358 -8~
Illustrative of or~no titana~es suitable or p~rposes of the present ~nvent;on are those ~lling within the scope of Formula ~
Formula I Ti(OR)4 wherein each R, which can be the same or different, is hydrogen ; or a hydrocarbon radical having one to 24 carbon atoms inc~usive, preferably one to 14 carbon atoms inclusive. By definition of an organo titanate at least one R is a hydrocarbon radical.
Exemplary of suitable hydrocarbon radicals are alkyl radicals such as methyl, ethyl, n-propyl, isopropyl, butyl, octyl, lauryl, myristyl, stearyl and the like, cycloaliphatic radica~s such as cyclopentyl, cyclohexyl and the like, aryl radicals such as phenyl, methylphenyl, chlorophenyl and the like, alkaryl radicals such as benzyl and the like.
Particularly desirable titanates falling within the scope of Formula I are those wherein each R is alkyl having one to 24 carbon atoms inclusive, preferably one to 14 carbon atoms inclusive, exemplified by tetrabutyl tieanate, tet~a-isopropyl titanate and the like.
Organo titanates falling within the scope of Formula Iare known compounds and can be conveniently prepared as describ-ed in U.S. patent 2,984,641 to Leon E. Wolinski patented May 16, 1961.
other suitable organo titanates are the organo titanium chelates such as tetraoctylene glycol titanium, triethanol amine titanate, titani~n acetyl acetonate, titanium lactate and the like.
In addition to the ethylene polymer and the organo titanate,the co~positions of the pre~ent inYention can als~ con-tain crosslinking agents when the composition is to be chemical ly crosslinked. These chemical vulcanizing, curlng or crosslink-ing agents are well known to those i~ the art and include the organic peroxide type of crosslinking agents which are disclosed for example, in ~.S. patents Nos~ 2,826,570, ~,88B,424, 2,916,471, 3,079,370 and 3,296,189. The chemical crosslinking agents may be used individually or in combination with one another, and they are usedin.crosslinkin~ amounts~ The pre~erred cross-]inking agent is a di~ ~-cumyl peroxide The compositions of the present invention can alsG in-clude one or more suitable high temperature antioxidants for the ethylene polymer in such compositions. The antioxidants include sterically hindered phenols or amines~ polymerized 2,2,4-tri-methyl dihydroquinoline, thiodiethylene-bis(3,5-ditert-butyl-4-hydroxy) hydrocinnamate, distearylt~iodiproprionate and the like.
Other additives which can be employed in the composi-tions of the present invention would-include additive~ commonly employed in ethylene polymer based dielectrlc compositions, in-cluding lubricants, oil extenders, dyes and colorants and metal deactivators.
The compositions of the present invention can also be extended with polymers,other than the ethylene polymer, which are compatible, i.e , can be physically blended or alloyed, or grated,with the ethylene polymer. The resul~ant compositions should contain at least about 30 weight percent of interpolymeriz-ed ethylene in ~11 the polymers that may be present in the '~J 6 3~
composition, based on the total weight of the ~esultant composi-tion. The other polymers which can be used include p~lypropyl-ene, rubbers or elastomers such as styrene-butadiene block copolymers 7 ~rethane elastomers, polyes t er elastomers, natural r~bber and the like.
The total amount of additives used w~ll range from O
to about 60 wei~ht percent~ preferably O to 10 weight percent based on the total weight of the compoSitionS
The following examples further illustrate the present invention and are not intended to limit the scope thereof in any manner.
Compositions were formulated, tested and rated for WTGR (Water Tree Growth Resistance) against a relative WTGR of 1.0 for a Control.
The water tree grvwth resistance of a composition con-taining a commercial grade of polyethylene ho~opoly~er having a Melt Index of 0.2 dg/minute and a density of 0.92 grams/cubic centimeter and 0.10 percent of 4j 4'thiobis(3-methyl-6-tert-butyl phenol) was determined by the procedure described in U.S, 20 patent 4,~12,756 granted March 13, 1979~ This composition had a relati~e value of 1.0 ~or water tree growth resistance.
A series of compositions were formulated and tested for WTGR. Each composition was prepared by admixing the ethylene polymer and organo titanate in a Brabender mixer at a tempera-ture of 155C until homogeniety was reached. Once homogeniety was reached, a heat stabilizer was added to the composition and mixing continued to a homogeneous mixture. Contents oE the Brabender were discharged and stored under argon unt~l tested * Trademark -7-.or water tr~ein~ growth resistance (WTGR) as described ~n U.S.
4~212,756 D
. COMPOSITIONS
FORMVLATION: _PER OE NT B ~EIGHT
A B C D
polyethylene Melt Index 0.2 dglmin Density 0.92 grams/cc ~.9 98.9 9~.9 98.
.
4,4'-thiobis(3-methyl-6- ~
tert-bu~yl,~henol) 0.1 0.1 0.1 0.1 (heat stabllizer) Tetraoctylene glycol titanium chelate 1.0 ---- ---- ----sopropyl tri-(lauryl-myristyl)titanate -~__ 1.0 Tetra-stearyl titanate ---- ---- 1.0 ____ , Tetrakis-(~-ethyl hexyl) titanate ---- ---- ---- 1.0 -WTGR 0.1730.189 0.435 0.358 -8~
Claims (20)
1. A water treeing resistant, crosslinkable composition, devoid of added mineral filler, comprising an ethylene polymer, a heat stabilizer, an organic peroxide and a hydrolyzable organo titanate which is an or-gano titanium chelate or an organo titanate having the formula:
Ti(OR)4 wherein R is hydrogen or a hydrocarbon radical, with at least one R being a hydrocarbon radical, said hydrolyzable organo titanate being present in an amount sufficient to improve the water treeing resistance of said com-position.
Ti(OR)4 wherein R is hydrogen or a hydrocarbon radical, with at least one R being a hydrocarbon radical, said hydrolyzable organo titanate being present in an amount sufficient to improve the water treeing resistance of said com-position.
2. A composition as defined in claim 1 wherein the organo titanate is pre-sent in an amount of about 0.5 to about 2 percent by weight.
3. A composition as defined in claim 1 wherein each R is a hydrocarbon radical.
4. A composition as defined in claim 3 wherein each R is alkyl.
5. A composition as defined in claim 1 wherein the organo titanate is isopropyl tri(lauryl-myristyl) titanate.
6. A composition as defined in claim 1 wherein the organo titanate is tetra-stearyl titanate.
7. A composition as defined in claim 1 wherein the organo titanate is tetrakis-(2-ethylhexyl) titanate.
8. The crosslinked product of the composition defined in claim 1.
9. A composition as defined in claim 1 wherein the ethylene polymer is polyethylene.
10. A composition as defined in claim 1 wherein said heat stabilizer is 4,4'-thiobis(3-methyl-6-tert-butyl phenol).
11. A composition as defined in claim 1 wherein the organo titanate is present in an amount of about 0.1 to about 5 percent by weight based on the weight of said polymer.
12. An electrical conductor insulated with the cured product of the com-position defined in claim 1.
13. A water treeing resistant composition, devoid of added mineral filler, comprising an ethylene polymer and a hydrolyzable organo titanium chelate in an amount sufficient to improve the water treeing resistance of said composition.
14. A composition as defined in claim 13 wherein said chelate is present in an amount of about 0.1 to about 5 percent by weight,
15. A composition as defined in claim 13 wherein the said chelate is present in an amount of about 0.5 to about 2 percent by weight.
16. A composition as defined in claim 13 wherein the said ethylene polymer is polyethylene.
17. A composition as defined in claim 13 wherein the said chelate is octylene glycol titanium chelate.
18. A composition as defined in claim 13 wherein the said chelate is octylene glycol titanium chelate and the said ethylene polymer is polyethylene.
19. A composition as defined in claim 1 wherein the organo titanate is an organo titanium chelate.
20. A composition as defined in claim 19 wherein the organo titanium chelate is octylene glycol titanium chelate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/218,794 US4369331A (en) | 1980-12-22 | 1980-12-22 | Ethylene polymer compositions stabilized against water treeing by an organic titanate; and the use thereof as insulation about electrical conductors |
| US218,794 | 1980-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1160384A true CA1160384A (en) | 1984-01-10 |
Family
ID=22816539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000391152A Expired CA1160384A (en) | 1980-12-22 | 1981-11-30 | Ethylene polymer compositions stabilized against water treeing by an organic titanate; and the use thereof as insulation about electrical conductors |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US4369331A (en) |
| EP (1) | EP0057286A3 (en) |
| JP (1) | JPS57126007A (en) |
| KR (1) | KR830007728A (en) |
| AR (1) | AR226766A1 (en) |
| AU (1) | AU7837881A (en) |
| BR (1) | BR8108236A (en) |
| CA (1) | CA1160384A (en) |
| DK (1) | DK566581A (en) |
| ES (1) | ES8600353A1 (en) |
| FI (1) | FI814101L (en) |
| GR (1) | GR77628B (en) |
| NO (1) | NO814346L (en) |
| ZA (1) | ZA818405B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4374224A (en) * | 1981-09-14 | 1983-02-15 | E. I. Du Pont De Nemours And Company | Tree-resistant ethylene polymer compositions containing aromatic polycarboxylic acid |
| DE3321268A1 (en) * | 1983-06-13 | 1984-12-13 | Siemens AG, 1000 Berlin und 8000 München | ELECTRICAL INSULATION |
| US4598116A (en) * | 1984-11-09 | 1986-07-01 | Union Carbide Corporation | Scorch resistant compositions based on water-curable thermoplastic polymers having hydrolyzable, pendant silane moieties, and organo titanates |
| DE3816397A1 (en) * | 1988-05-13 | 1989-11-23 | Basf Ag | ELECTRICAL CABLES CONTAINING INSULATIONS BASED ON EHTYLENE POLYMERISATES WITH HIGH RESISTANCE TO THE FORMATION OF WATER TREES |
| US5229588A (en) * | 1991-09-30 | 1993-07-20 | Ncr Corporation | Dual aperture optical scanner |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3103490A (en) * | 1963-09-10 | Table zxeffect o of concentration op tetrabu- | ||
| US2549940A (en) * | 1946-08-22 | 1951-04-24 | Du Pont | Titanation of polyvinyl resins |
| US2720468A (en) * | 1954-05-28 | 1955-10-11 | Du Pont | Process for gelling |
| US2917414A (en) * | 1955-11-21 | 1959-12-15 | Dow Corning | Electrical conductors coated with titanate-modified alkyd resins |
| US2984641A (en) * | 1956-06-20 | 1961-05-16 | Du Pont | Polyethylene compositions containing titanium organic compounds and structures produced therefrom |
| US3418348A (en) * | 1964-06-01 | 1968-12-24 | Hooker Chemical Corp | Phenyl titanium esters and preparations thereof |
| US3491075A (en) * | 1965-10-13 | 1970-01-20 | Union Oil Co | Crosslinking of polymers having dependent ester groups with polyvalent metal alkoxides |
| US4020214A (en) * | 1973-06-21 | 1977-04-26 | General Electric Company | Method of making an insulated electrical conductor using pressureless curing of filled ethylene containing polymeric compositions, and an insulated conductor formed thereby |
| US3923731A (en) * | 1973-06-21 | 1975-12-02 | Gen Electric | Pressureless curing of filled ethylene containing polymeric compositions |
| CA1022633A (en) * | 1974-05-04 | 1977-12-13 | Shuji Yamamoto | Dual coated power cable with calcium oxide filler |
| US4206260A (en) * | 1976-07-28 | 1980-06-03 | E. I. Du Pont De Nemours And Company | Polyethylene insulation containing a tree growth-inhibiting alcohol |
| GB1564990A (en) * | 1976-07-28 | 1980-04-16 | Du Pont | Electrical insulation compositions |
| DE2635176C2 (en) * | 1976-08-05 | 1982-05-06 | Durol Gmbh & Co Kg Chemische Fabrik Lindau-Bodensee, 8990 Lindau | Curable molding compounds based on chlorosulfonated polyolefins |
| ZA787062B (en) * | 1977-12-27 | 1980-04-30 | Union Carbide Corp | Wire or cable insulated with a dielectric composition stabilized against water treeing with organo silane compounds |
| DE2837311C2 (en) * | 1978-08-26 | 1983-11-24 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Voltage stabilized electrical insulation |
| US4299713A (en) * | 1979-07-19 | 1981-11-10 | National Distillers And Chemical Corp. | Electrical tree and water tree resistant polymer compositions |
-
1980
- 1980-12-22 US US06/218,794 patent/US4369331A/en not_active Expired - Lifetime
-
1981
- 1981-11-30 CA CA000391152A patent/CA1160384A/en not_active Expired
- 1981-12-03 ZA ZA818405A patent/ZA818405B/en unknown
- 1981-12-08 AU AU78378/81A patent/AU7837881A/en not_active Abandoned
- 1981-12-16 JP JP56201744A patent/JPS57126007A/en active Pending
- 1981-12-17 BR BR8108236A patent/BR8108236A/en unknown
- 1981-12-18 NO NO814346A patent/NO814346L/en unknown
- 1981-12-21 DK DK566581A patent/DK566581A/en not_active Application Discontinuation
- 1981-12-21 FI FI814101A patent/FI814101L/en not_active Application Discontinuation
- 1981-12-21 GR GR66856A patent/GR77628B/el unknown
- 1981-12-21 EP EP81110660A patent/EP0057286A3/en not_active Ceased
- 1981-12-21 ES ES508197A patent/ES8600353A1/en not_active Expired
- 1981-12-21 KR KR1019810005039A patent/KR830007728A/en unknown
- 1981-12-21 AR AR287875A patent/AR226766A1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| ZA818405B (en) | 1982-10-27 |
| EP0057286A2 (en) | 1982-08-11 |
| EP0057286A3 (en) | 1982-09-01 |
| KR830007728A (en) | 1983-11-07 |
| US4369331A (en) | 1983-01-18 |
| ES508197A0 (en) | 1985-10-16 |
| JPS57126007A (en) | 1982-08-05 |
| AR226766A1 (en) | 1982-08-13 |
| DK566581A (en) | 1982-06-23 |
| FI814101L (en) | 1982-06-23 |
| ES8600353A1 (en) | 1985-10-16 |
| GR77628B (en) | 1984-09-25 |
| NO814346L (en) | 1982-06-23 |
| AU7837881A (en) | 1982-07-01 |
| BR8108236A (en) | 1982-10-05 |
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